Drilling and Blasting MCQs Questions & Answers | Mining Engineering

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31.
Each oxygen cylinder in Novex reviving apparatus containing . . . . . . . . litter of O₂ charged to . . . . . . . . atmospheres.

A. 200; 60

B. 250; 80

C. 400; 120

D. 420, 140

Answer & Solution Discuss in Board Save for Later

32.
Mucking means

A. Loading and transportation

B. Spraying of water in face

C. Removal of blasting rock and clean the face

D. Charging with explosions and stemming

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33.
To avoid freezing of NG explosive which agent is mixed.

A. PETN

B. TNT

C. Di Nitro Glycol

D. ASA

Answer & Solution Discuss in Board Save for Later

34.
Maximum or shut off head developed by centrifugal fan when

A. Fan has maximum velocity

B. Noair passes through fan

C. Maximum air passes through fan

D. None

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35.
The formula for theoretical depression of axial flow fan will be

A. $$H = \frac{{2{U^2}}}{{2g}}$$

B. $$H = \frac{{{V^2}\cot \theta }}{g}$$

C. $$H = \frac{{{U^2}}}{{2g}}$$

D. $$H = \frac{{{U^2}}}{g}$$

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36.
The self rescuer can be used for . . . . . . . . hours.

A. 1

B. 2

C. 3

D. $$\frac{1}{2}$$

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37.
Coal mines are said to be steep if the inclination in between.

A. 5° - 18°

B. 18° - 40°

C. 0° - 5°

D. Above 40°

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38.
Main purpose of tippler

A. Tipping the mineral

B. Turning the coal tub

C. Move mineral from one place

D. All of these

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39.
Cooling chamber of protomark IV apparatus made of . . . . . . . .

A. Alluminium

B. Brass

C. Steel

D. Copper

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40.
CO₂ absorbent keeps the percentage of CO₂ in breathing circuit below . . . . . . . .% in proto mark IV apparatus.

A. 1

B. 2

C. 3

D. 4

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Drilling and Blasting MCQs Questions & Answers | Mining Engineering

31. Each oxygen cylinder in Novex reviving apparatus containing . . . . . . . . litter of O2 charged to . . . . . . . . atmospheres.

Answer & Solution

32. Mucking means

Answer & Solution

33. To avoid freezing of NG explosive which agent is mixed.

Answer & Solution

34. Maximum or shut off head developed by centrifugal fan when

Answer & Solution

35. The formula for theoretical depression of axial flow fan will be

Answer & Solution

36. The self rescuer can be used for . . . . . . . . hours.

Answer & Solution

37. Coal mines are said to be steep if the inclination in between.

Answer & Solution

38. Main purpose of tippler

Answer & Solution

39. Cooling chamber of protomark IV apparatus made of . . . . . . . .

Answer & Solution

40. CO2 absorbent keeps the percentage of CO2 in breathing circuit below . . . . . . . .% in proto mark IV apparatus.

Answer & Solution

Read More Section(Drilling and Blasting)

31.
Each oxygen cylinder in Novex reviving apparatus containing . . . . . . . . litter of O₂ charged to . . . . . . . . atmospheres.

32.
Mucking means

33.
To avoid freezing of NG explosive which agent is mixed.

34.
Maximum or shut off head developed by centrifugal fan when

35.
The formula for theoretical depression of axial flow fan will be

36.
The self rescuer can be used for . . . . . . . . hours.

37.
Coal mines are said to be steep if the inclination in between.

38.
Main purpose of tippler

39.
Cooling chamber of protomark IV apparatus made of . . . . . . . .

40.
CO₂ absorbent keeps the percentage of CO₂ in breathing circuit below . . . . . . . .% in proto mark IV apparatus.